Application: For Use on Residential and Commercial Air Conditioning Units, Heat Pumps and Room Air Conditioners, Provide Additional Starting Torque to all Single Phase 115 thru 288 Volt Units, APR5 Will Open After 1-1.5 Seconds If the Motor Does not Start for Any Reason, Protects Start Winding from Overloading During a Locked Rotor Condition by Removing it form the Circuit